A powered room air purifier with a visual indicator of air quality, the visual indicator including: a reflector that defines a forwardly-open-ended reflecting cavity and that includes at least one through-opening in a floor or ceiling of the reflector; at least one diffuser layer that covers the forward opening of the forward-open-ended reflecting cavity; and, at least one LED light source that is positioned within the at least one through-opening, the LED light source and the reflector being configured so that the LED light source is shielded from line-of-sight view along a forward-rearward axis of the powered room air purifier.

An HVAC system within a building including an HVAC device having an air filter, a number of sensors, and a control device. The control device has a processor that is configured to determine a current air quality metric based on air quality measurements received by the sensor. The control device is further configured to calculate an average air quality metric based on the current air quality metric and a set of previous air quality metrics. The control device is further configured to store the average air quality metric. The control device is further configured to generate an air filter type recommendation based on the average air quality metric.

An environment control system is an environment control system that controls an environment of a target space. The environment control system includes: an obtainer that obtains biological information of a person present in the target space and environmental information of the target space; an estimator that estimates, based on the biological information and the environmental information obtained by the obtainer, a position of the person in the target space and a condition level indicating a level of comfort felt by the person in regard to the environment; a generator that generates, based on the position and the condition level of the person estimated by the estimator, a control signal that controls an operation of a device provided in the target space; and an outputter that outputs the control signal generated by the generator to the device.

A system, method and apparatus for augmenting a building control system domain. A sensor network platform can be configured to collect data based on measurements from sensors outside of a legacy building control system domain, and to present information based on the collected data to a known interface supported by the legacy building control system. In one embodiment, the collected data can undergo customized processing by an operation center outside of the legacy building control system domain.

A networked air quality monitoring system. Such a system could provide information beyond the user's local instrument on air quality over a much larger area. This information could be used by a user to make decisions about frequenting particular areas based on the results, or to alert them to changing conditions in the area so that the user might act before local conditions change.

Disclosed example respirators comprise: a filter configured to filter the air; a blower fan configured to provide continuous air flow at variable speeds; an air duct configured to direct air from the blower fan to an exhaust location, the blower fan configured to blow air through the air duct; and a blower controller configured to: control the blower fan to automatically adjust an airflow speed of the blower fan to a plurality of airflow speeds over a plurality of different time periods, the plurality of airflow speeds being within an airflow speed range.

Antimicrobial compositions and methods for inhibiting microbial growth are disclosed. The antimicrobial compositions can include an acyl lactylate, a glycol, and a carrier. The carrier can include water. Water can form at least about 90% by weight of the composition.

An air-conditioning system is provided that may include a first air-processing apparatus, which includes a first inlet formed in a first surface thereof that extends perpendicular to a floor or a ceiling and a first outlet formed in a second surface thereof perpendicular to the first inlet and induces air introduced into the first inlet to exchange heat with refrigerant and to be discharged through the first outlet, and a second air-processing apparatus, which includes a second outlet formed therein so as to be open in a same direction as the first outlet and a second inlet formed therein so as to be open in a same direction as the first inlet. The air-conditioning system may be driven in a combined operation mode in which the first and second air-processing apparatuses operate simultaneously or an independent operation mode in which one of the first air-processing apparatus or the second air-processing apparatus operates.

An air circulation device includes a housing including an exhaust, a base including a filter intake and a bypass intake, and a damper system adjustable between a filter state and a bypass state. The damper system includes a bypass damper translatable via a bypass actuator, a filter damper translatable via a filter actuator, a filter mechanism disposed between the filter damper and the filter intake, a motor coupled to the bypass actuator and the filter actuator that allows the bypass damper and the filter damper to translate between an open position and a closed position, and a control mechanism can also have a sensor. The control mechanism is configured to adjust the damper system between the filter state and the bypass state, and the sensor determines an air quality rating of the air and compares the air quality rating of the air to a predetermined air quality threshold.

A method for controlling an air conditioner includes receiving, by the air conditioner, first position information sent by a terminal and updating position information of the air conditioner from second position information to the first position information. The first position information is obtained by a positioning module of the terminal positioning the air conditioner.